Improvement in head-blocks foe saw-mills



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rll'l US Wlll'lM ORE, O F DUB U Q'UEe IOWA.

Letters Patent No. (39,055, dated Slugieiizbfr 17,' ISGT IMPROVEMENT IN HEAD-BLOCKS POR SAW-MILLS.

TO ALL WI-IOM IT MAY 'CCINCERNz` Bc it known that I, TITUs WnITMonI-z, of Dubuque, in the county of Dubuque, and State of Iowa, have invented a new and improved Setter for Saw-Hills; and I do hereby declare that the following is a full, clear,

und exact description thereof, reference being had to the accompanying drawings forming part of this specification.

The object of my invention is to provide a device by which the logs may be set automatically to u. circular mill-saw for manufacturing lumber,l and consists in providingr an indexplate made in theform of a disk with a cum, und a crank-lever located upon a shaft, for the purpose 0f throwing off the set of the log to the saw when it has gained the point designed for the thickness of lumber.

To enable others skilled in the art to make andV use my invention, I will proceed to describe its construction:

and operation. Y

Figure 1 is a top'plan view of my improved setter for circular-saw mills.

Figure 2 is a side elevation of the same.

Letters of like namcand kind refer to like parts in each of' the figures.

A represents the base upon which my setting device is secured.` B is a rectangular frame, made of wood or other proper material, mounted and supported upon any suitable number of posts, C G C C. D is a shaft provided with journals which run in bearings, a, secured to the posts C C. Upon the outer end of the shaft D, and outside of the post c, isa band-wheel, E, for the purpose of driving the machine. F is also another bandwheel secured to and revolves with the shaft l). Around this band-wheel F works the band G that passes over vand works around and drives the pulley II that runs loose upon the shaft I, the said shaft I'being provided with proper journals which run in suitable bearings, JJ, located and secured upon Athe top of the frame B. Upon shaft I is secured a pinionwheel, K, provided with a clutch, L, that is designed to engage with a similar clutch upon the band-wheel II, the clutch and pinion K and L being operated by a lever, M, pivoted at e to the cross-timber N, for the purpose of throwing the clutch L out and intogeur with the clutch upon the band-wheel I'I, so us to operate the fced-worl s of the device. The pinion K fits and meshes into and drives a corresponding gear-wheel, O, that is rigidly secured to the shaft P, that has journals which run in bearings located and secured to the timbers Q Q, the said timbers being framed into the posts AC immediately under the top timbers or frame B. Upon this shaft I? is also secured a band-wheel, R, from which a belt, R', passes, to drive the feed-screw S that moves the log laterally over to the sew in bearings al, upon the side of the platform A. Upon the inner end of the feed-screw a pulley, b', is secured, over which the belt R is placed when the log is to be fed tothe saw. A loose pulley, C', is placed upon the feed-screw between its inner bearing, secured to the platform LA and the xed'pulloy. Qver this the belt It is shifted when the log has been fed the required distance. By the operation of the feed-screw, through the medium of suitable gearing, the sliding blocks d! are movedin grooves or slots el, formed in the cross-bars of the platform supporting the carriage. But s these do not formen. part of my invention, I do not claim them. Upon the side of the post S, und to the timber Q, is secured e. bearing or axle, (shown only at i, iig. 2,) upon which is a movable index-wheel, T, with the sides perforated in a. novel and peculiar manner, in which is fitted a movable point, y, that passes through a mcrtisc, m, in the spring et,

that is secured tothe axle z', to indicate or regulate thc thickness of lumber to bc cut. The periphery of the' wheel 'l is provided with ratehets, in which work the dog t? and pawl-levcr e2, for the purpose of giving a deflnite or limited feed lo the hund-wheel Il. f is a spring secured to the` plate b, thntis secured to blocks tyt,

which :ire secured to und project` out from the frame or posts C C, so as to bring tho pawl-lever e'l in rango or over the face of the index-wheel T.' U is an arm secured to the outer end ofthe shaft I, and cngageswith the cam W, that is secured to the inside of theindex-whcel, for the purpose of throwing out the clutch AL when the log has been set over laterally to the saw as fur as designed, which, when the clutch becomes disengaged or released from the bandwheel Il, stops the later-.il movement of the log at a point ready for the saw'. Y is a pl'ntc of peculiar form, secured to the top of the frame B, to prevent the band G from running olf the band wheel Il, and toprevcut the wheel from moving with the shaft.,V It will be understood-that the pinionfwheel K is provided with only half as many teeth as the gear-whcel O, consequently makes twice as many turns as the wheel O. lhe perforations in the side ofthe index-wheel T are 'marked by numerals 1, 2, 8, and so,

any desired nnihbcr, us shown in the drawings. When any given thickness of -luinbcr is required, th 4'piu 1/ is set in n. perforation in the index-wheel T, numbered to correspond to half the number of revolutions of.

the pinion K. For example, if ten turnsof the pinion K are desired to move the log the distance required, the point or pin y is set in the perforation number 5. The clutch L is then engaged with the band-wheel II and the machine put in motion, which, by the action o f the dog a2 upon the index-wheel T,'is moved round one notch untilteu turns of the band-wheel II are made, which has brought the eam W round so :is to engage with the arm U upon the end of the shaft I, which throws the said shaft back in a longitudinal direction, and disengages the eluteh; v at the same time theubar or plate Y prevents the band-wheel from being moved with the shaft, as it is made to slide through the eye of the Wheel, and moves with the shaft only when engaged with the clutch L. v When a half-turn or revolution is desired, the point or pin g/ is placed in the inside circle of perforat-ions. When the log. has been set over to the sa'w by the device, and the clutch becomes disengaged, by drawing the pztwl-lever e2 back, disengages it from the index-wheel T, when, bythe action ofthe coiled spring A, which is secured to the cross-bar BZ, throws back the index, when it is ready to set the log over for another out. It 'will also be observed that the feedlserew C should be the same pitch asntlie gear-wheel O, so that both willmahe Ythe same number of revolutions, thus making a device by which the log willbe set to the saw in the most precise and unerring manner. Y

Having thus described my invention, what I claim as new, and desire to secure by Letters Patient, is-

The combination and arrangement of the index-wheel T, having cam W, spring A2, slotted arm ?1,'carrying pin (f1/,spring pand-lever c2, arm V, dog az upon shaft I, pinion K, clutch L, gear-wheel O and bend-wheel O, and foed-serew S, whereby the log is set to. the saw, as herein set forth, for the purpose specified.

` Tiros WIII'rMonE. IVitnesses:4 d

H. RoUsE,

P. SAGE. 

